Just to let people know that I have successfully replaced connector 3 on two phones I have. Cost a bomb for the microscope and the soldering kit and it is very hard. Also, the microscope shows things such as manufacturing defects in cables e.g. I had a phone which always thinks that the headphones are plugged in. Turns out that two pins have been shorted together with solder during manufacture.
Cheers
Spencer
Cheers
Spencer